Knot removing and repairing machine



Dec. 29, 1931. G. MAURER KNOT REMOVING AND REPAIRNG MACHINE 4 Sheets-Sheet 1 Filed July 1o, 1930 PIII Ill;

l NVENTUR; A @nfmadr/raw E1 EN M ATTDRNEYS' Dec. 29, 1931. G. MAURER 1,838,426

xNoT REMOVING AND REPAIRING MACHINE Filed July lO, 1950 4 Sheets-Sheet 2 2 INVENTUR.

[Umfried Maurer* ATTE] RNEYE.

Dec. l29, 1931. G'. MAURER 1,838,426

KNOT REMOVING AND REPAIRING`MACHINE Filed July 1o, 1930 4 sheets-sheet s ATTURNEYS.

Dec. 29, 1931. c5.y MAURER 1,838,426

KNOT REMOVING AND REPAIRING MACHINE Filed July l0, 1930 4 Sheets-Sheet 4 INVENTDIQ E mlfr-iad Maur EF Patented Dec.29,1931 .Y 1,833,426

UNITED STA'ris-.s PATENT .OFFICE 1 eoT'rrnr-ED Mmmm, znnrofir, SWITZERnAND 'l l l Application filed July 10, 1930, Serial No. 46?;027, Vandin Switzerland July 11, 1929.

I have filed applications for patents in with, upon which a vertically positioned ear Switzerland, July 111929,'and May 3, 1930; riage 6 slides horizontally, having vblocks 4 Germany,` May 10, 1930; Austria, 13, and connectedtherewith and sliding on the 1930; France, May 16, 1930; Belgium, May beveled surfaces othe rails 1 and 2, as shown 22,1930; Czechoslovakia,May26,1930;Portu in Figure 2. i 55 gal, May 27,'1930;,Spain,"h[ay 31, `1930; Den- 1 `The carriage 6 is provided with a fixed mark, May 31, 1930; Sweden, June 6, 1930; bracket 7 upon which a motor 8 is mounted. England, 'June 12, 1930; Norway, J une 13, 'The shaft 9 of the motor has aworm 11 keyed lo 1930. therewith, and also a pulley 10., A wormV This invention relates toan improvedma- ,Wheel l2, meshing Wlthe lWOrm V11, iS keyed chine for the automatic extraction ofpkn'ots upon ajshaft 13 yrotatably supported in a from boards, and the insertion of a filler in suitable bearing upon a bracket 1.7 xed with the knot-hole. f1 the carriage. 'This shaft 13 is alsoprovided "The primary object ofthel invention is the with a spur gear' wheel' 14: meshing with a provision of an improved machine-,which-will second gear 15.rotatably. mounted upon a ".5 bore knots `out, of boards,in an efficient rela- Shaft 16. vThe shaft 1 6`rOt-ates in suitable tion, and automatically glue and place ailler bearingsin the bracket 17, as shown in iFig plug o'twood in the hole in the boardleft `ure'2. j .l i after removal `of the knot.V I j An eccentric or ca m 18l is keyedu on the VOther objects and advantages of this inshaft 16, rotating'in the direction of the ar- "N vention will be apparent duringrthe course row shown in Figure 1; the same'being loof Jthe following detailed description. cated between relative convergent brackets In the accompanying drawings, forming or supports 19`and20, ifiXed upon the frame part of thisl specification, and wherein simi- 3.` These supports 19 and k20 areV provided lar reference characters designate correwith rollers 21 at the free ends, between :mi spending parts throughout the severaliview's, which the cam 18 operates, so that the outer `Figure 1 is a front view of apreterred periphery will engage the rollers and cause `type oi' machine for removing knots and 4vfilla reciprocationf of the carriage '6 upon Ythe ing the holes left thereby. frame 3, during .rotation of the shaft 16. Figure 2 'is a side View ofthe machine The carriage 6 is provided upon `the front 80 shown in Figure 1. t side thereof with a -horizontal' shaft 23, ro- Figure 3 is a front view of a modilied forni "tating in bearings 211` and 25 affixed to the of apparatus tor removing knots and placing carriage. A bevel gear 27 is splined upon filler blocks in the openings left thereby. vthe shaft 23, beingmoved intov or out of en- Figure 4 is a side view, partly fin section, gagement with a bevel gear 22 keyed on the "8 ofthe modified machine. shaft 16, by means of an operating lever26,

Figure 5 is a fragmentary view, partly in which is ivoted on the carriage, intermedisection, showing the ,device .for applying glue ate its en sas shown Yin 'Figure 1. to the filler block. Y There is"positioned upon the front of thev` Figure `6 is a sectional View showing tongs carriage 61a bore spindle 28, vertically disfor holding the wooden block for placement posed, having a suitable chuck for detachthereofvin'a pressing-in device. l .ably receiving a drill bit or knot" hole borer Figure 7 is a ragmentaryview, partly in 2 9. This spindle 28 is rotatably supported 4fsection, showingthefrelation in which the 'in rsuitable brackets or bearings, .and.is `di tongs of Figure 6vhold`the wooden blockwith rectly driven from the motor 8 b y means 0F95 respect to@ Saw. a belt 30 whichpasses through an opening Referring to the form oit'` invention shown inthe carriage. '6; the belt 30 operating on in Figures 1 and 2`of the drawings, the mathe pulley 10 yabove mentioned, and over Va chine consists of a stand or frame 3 having pulley .keyed to ythe vspiiid'le 28,. as shownin m0 parallel guide rails 1 and 2`connected there- Figure 2. 'This'spindle 28 is normally held in its highest position by means of a spiral spring 31. Its depression is brought about by means of an eccentric or cam 32, keyed on the shaft 23, which operates over a roller or other device placed at the top of the spindle 28.

Adjacent to the bore spindle 28 is located a device for inserting a wooden filler block in the board hole. This device, called a pressing-in device, designated at 33, includes a tubular vertically disposed container 34, receiving thc filler blocks in a stacked relation. The container 34 at itslower end is provided withwa glue-pot 35, as shown in Figure 1. Operatively associated with the spindle 28, container 34, and the glue-pot, is a bell crank lever 36, which is swivelly connected at one end to the spindle 28, and at the opposite end is pivotally connected to a reciprocating member 37 operating across the lower end of che container 34. Upon retraction of the bore spindle 28, it is 4to be noted that the bell crank lever 36 is rocked upon its pivot, lso that the lowermost block in the magazine or container 34 is pushed by the slide 37 into the lower end of the jacket of the pressing-in device 33. During its passage from the magazine 34 into the jacket of the pressing-in device, the block guides over a roller 38 mounted in the glue pot 35. This roller partially dips into the glue in the pot 35, and is peripherally coated with glue. As the lowermost filler block rides over the roller 38, it is apparent that the under-surface is coated with the glue.

As soon as the bit 29 has left the borehole, the carriage 6, under action of the eccentric 18, is laterally displaced to the right, in such manner that the lower end of the jacket 39 of the pressing-in device 33 comes to a position directly over the bored hole.

As before mentioned, the pressing-in device 33 includes the jacket 39, having a slit or lateral opening 40, through which the filler block is inserted by the slide 37. Operating in the jacket 39 is a piston 42. The jacket 39, as well as the piston 42, are pressed by individual springs, shown in Figure 1, so that they are normally urged upwardly. A press rod 43 acts upon the jacket 39; being activated by an eccentric 44 keyed upon the shaft 23. A press rod 45 acts upon-thepiston 42; being activated by an eccentric 46 keyed upon the shaft 23, as shown in Figure 1.

At about the same time that the carriage 6 is moved by the eccentric 18, the press rod 43 commences to depress the acket 39,

Fthrough action of the eccentric 44, and the pressing-in device is t-hus lowered so that it comes to rest on a piece of board to be treated,

as soon as the lateral displacement of the carriage has ended. The eccentric 46 then comes into play and presses the rod 45 downwardly, so that the piston 42 presses the block Referring to the modified form of invention shown; in Figures 3 to 7 inclusive, the same is automatically functionable, the same as the preferredform, but in addition the modified device saws off the block from a bar of wood supported upon' the machine. possible with this modified machine to always insert the wooden block with the direction of the fiber corresponding to that of the board to be treated. In addition, in the modified device there is provided holding means for maintaining the board to betreated rigid du rin g treatment, and eliminating manual effort upon the part of the operator in this connection.

The modified form of machine includes W frame 51 provided with an` upstanding bracket arm 52 having a bearing 53 rotatably bearing a horizontal shaft 54. The shaft 54 has a sprocket wheel 55 rotatable thereon,

which is providedfwith a clutch 56 that mayM Q5 be connected and disconnected during operation. This sprocket Wheel 55 is driven through reduction gearing; the latter being operated by means of a suitable motor (not shown), supported in any approved n'1anner1e0 upon the frame 51.

The shaft 54 has an eccentric or cam 57 keyed therewith, operating upon a roller 58 carried by a lever 59. The lever 59 is supported at one end upon the frame 51, as shown 105 in Figure 4. The lever 59 intermediate its ends is connected to a press rod 60 suitably reciprocably supported upon the frame 51. It has a spring 6l normally urging it upward The rod 60 in turn activates a lever 62, oscil! .1.10

lating a shaft 63 mounted upon the frame 51, as shown in the drawings. This shaft 63 is provided with clamping fingers 64, shown in the lower part of Figure 4, which press against the piece of work to be treated, for lle' holding it against the work table, in a manner which is perfectly apparent.

A carriage 68 is provided, movable upon the frame 5l. The latter is provided with tapered guide rails 65 and 66, over which roll- 12o ers 67, supported by the carriage 68, operate to enable the carriage to move horizontally back and forth on the frame 51 in a deinite path. This carriage is provided with bearings 69 and 70, supporting the shaft 54 and 125 sliding thereon in a manner which is apparent. The carriage 68 is provided with :i roller 71 operating upon the cam edge of a cylinder-li ke member 72 which is keyed on the shaft54, as shown in Figure 3. This cam 1,30

rotatably supports a roller 78, acted upon by the eccentric 7 3 above mentioned. Thefslid'e is normally urged upwardly by a springf79. Thisslide rotatably carries a vertical bore spindle 80, which at the lowerrend is providedwith a suitable chuck for receiving a drill -bit 81. It has apulley 82 operated by means of a belt R, driven direct from the motor carried by the frame 51.

The carriage 68 is provided with a device for sawing olif, glue-coating, and pressing the liller block into the` `hole bored by the bit 81. This device is supported upon a slide 88. which is vertically displaceable upon the carriage 68 in the same `manner as above described for the slide 7 6. The. slide 83 has'a roller 84 at its upper end upon which theeccentric 74 operates, vbeing normally urged upwardly by vany approved spring device.

The device for pressingin the wooden yfiller block consists of al jacket v85, fixedwiththe j slide 83, wherein a pistonA 86 operates forl pressing in the Afiller block. This pistonis normally spring urged downwardly. The action of the eccentric 74 `is such `that initially the whole slide- 88 is lowered, including the jacket 85,` until the lattercomes to rest upon the work1 thereafter the piston 86 is further lowered for causing the pressing-in action.

A. vertical tubular jacket 88 holds a wooden bar, from which thefiller blocks are to be cut. VThe internalr diameteris equal to that of the boredlhole.

Beneath the jacket 85 there yis disposed a tong or clamping device 89, the gripping ends of which engage upon the lower end of the wooden bar protruding from the jacket 88. The tong Shanks have projections 901 against whichmembers 91 operatev during movement of the carriage 68 to effect a closingof the tongs 89. The slide 92, Yhaving'a curvature of 180, operates'upon` a.. suitable guide carried by the pressing-in device. Tt is connected by an adjustable turn-buckle 98 with a bell crank leverv94= mounted upon the carriage 68. The opposite end of the bell cranklever 94 is connected with thespindle supporting slide 76. and byV movement ofthe same the slide 92 is drawn between the shanks ofthe tong 89 for'pushing a filler block into the tong 89 in clampingposition. f

The frame 51 has a support 95 vertically supporting a shaft 96 upon a` iiXed axis. This shaft has a circular saw blade98 keyed therewith, and is provided with a pulley 97 light socket.

`rectlyovergthe hole just bored.4 spindle ascends, the slide92 'is'againdrawni in a pair oi plungers 100 are guided, see Figure These Y plungers veach `include guide rods 101, having enlarged outer heads v102. VThey are guided through suitable glands or .screws 108, closing the outer ends ofithe'openings 99, as shown in Figure 8. The pistons '100 are normally pressed, by suitablezsprings in the passagewaysl99, .against the Wooden Ibar in the jacket88, as show-n in Figure 5;

thevjacket 88 being: provided with suitable openings for receiving the ends of the plungers to enable this operation, which secures the bar in proper position against movement. 1 Due to Vthe action of, their springs 'theypistons 100 follow ailateral dis- 103, .and upon continued lateralamovement ot thecarriage, the wooden bar 1s released, Y

lpermitting the-woodenjpluginthe jacket 88 to drop. c Y

The pressing-in device,;beneath 4the jacket 88- i'sprovided with-a glue'pot105, wherein af roller 106 is` operatively Ymounted for dipping intoA the (glue. The .lower part 107 ofthe glue-pot contains an electric `heating'device, which by-means of an ordinary plug contact'andicord canlbe attached to: a

The operation `ofV the improved :machine 1withhorizontal guide passageways99 whereplacement of the carriage 68, until the heads i '102 come intov engagement Vwith the screws just described is substantially asfollowsz- The bore spindle'80 is rotated by `the .motor (notshown), and theboard is laid uponthe work-table so that thcknot to 'be `removed Vand vreplaced'by a` filler block lies' directly under the drill vbit/81. The clutch 56 is thrown into engagement with Vthe sprocket "wheel 55, and the shaft 54 commences to `ro- `tate slowly. Thereceentric 57- at. once acts` upon the pressing rod 60 to clamp the'clamp-A ing iingers 64'for holding the `work against the table. The eccentric 78 then depresses 'Y the slide 7 6, and lofrcourse `the blade of `the drill` bit bores -the knot `from the piece-ofwork. The slide 92 is activated by lowering of the bore spindlegthrough; the bell crank lever 94 just described, and pushes; `the'filler :block rom'thejacket 88into'the tong 89 be- .i

'nea-th' the pressing-in piston ,ofthe jacket 85.

.During this act the :tong-:is slightly open. -The i vfiller block as Ait ,moves .over thev roller 106 is dipped inte. thevv glue on its undersurface. YAs soon 'as `tlieudrill 4bit blade has left the` piece Vof work, :thecamyedge oil-the` carriage di splacmg'cam 72 operates upon the 'roller`71 to movetheicarriagetothe extent v'that the pressing-in device comes toirest-di- As the' bore L io back by means of the bell crank lever 94, and the pistons 100 are then released as above described, permitting the bar of Wood in the jacket 88 to release and fall until it comes to rest on the cover of the glue container 105. The projections 90 on the shanks of the tong 89 strike against the members 91 fastened to the frame 51, as shown in Figure 6, closing the tong 89 for grasping the Wooden bar in the jacket 88. As soon as the lateral displacement of the carriage is complete, the eccentric 74 operates the pressing-in device. First, the Whole device descends until it rests upon the treated board, thereafter the carriage 6 further descends for pushing the filler block into the hole just bored. After this the eccentric 74 releases the pressing-in device, and under spring action it is raised. When the pressing-in. device is at its highest position Jdie cam 72 releases the carriage 68, which under action of its springs returns the carriage to the left. In the course of retraction of the carriage the circular saw-blade 98 enga-ges the lower end of the bar of Woo-d projecting from the jacket 88, cutting oli the next filler block, which is held by the tongs 89 in position for a succeeding operation. Thereafter the eccentrie? releases the clamping lingers 64, and at this moment the clutch 56 is disengaged. The operation is thus completed and the machine is again in initial position.

Various changes in the shape, size, and arrangement of parts may be made to the forms of invention herein shown and described, Without departing from the spirit of the invention or the scope of the claims.

I claim:

l. In a machine of the class described the combination of a frame, a movable carriage on the frame, a boring device on the carriage, means for operating the boring device for boring a hole in a piece of Work, a filler block dispensing device, means operated by the boring device for ej ecting a filler block from the filler block dispensing device, means automatically operable after boring of a hole to move the filler block dispensing device so that the filler block ejected lies over the hole immediately bored by said boring device, and means for forcing said filler block into said hole.

2. In a machine of the class described the combination of a frame, a movable carriage on the frame, a boring device on the carriage, means for operating the boring device for boring a hole in a piece of Work, a filler block dispensing device, means operated by the boring device for ejecting a filler block from the filler block dispensing device, means automatically operable after boring of a hole to move the filler block dispensing device so that the filler block ejected lies over the hole immediately bored by said boring device, means for forcing said ller block into said hole, and means for gluing said block as it is .ejected into position upon retraction of the boring device.

3. In a machine of the class described the combination of a stationary frame, a carriage movable on the stationary frame, a reciprocatory boring device on the carriage, means for rotating the boring device for boring a hole, means for operating the reciprocatory boring device longitudinally for boring a hole in a piece of Work and retracting thereafter,

a magazine receiving a plurality of filler blocks, a pressing-in device, means connected With the boring device Jfor ejecting a iiller block from the magazine into the pressing-in device, means for automatically movingnthe carriage after a boring operation for moving the pressing-in device so that the filler block is over the opening bored in the board, and means for thereafter operating the pressing-in device to press the block of wood into after, a magazine receiving a plurality of filler blocks, a pressing-in device, means connected With the boring device for ejecting a tiller block from the magazine into the pressingin device, means for automatically moving the carriage after a boring operation for moving the pressing-in device so that the filler block is over the opening bored in the board, means for thereafter operating the pressingin device to press the block of Wood into the bored opening, and means for automatically applying glue to the filler block in its passa gc from the magazine to the pressing-in device.

5. In a machine of the class described the combination of a supporting frame, a carriage slidable on the frame, a rotatable and reciprocatory boring device for boring holes in a piece of Work, a magazine for supporting a piece of Wood from which iiller blocks are to be cut, means for moving the carriage, sawing means for removing a filler block from the piece of Wood upon movement of the carriage in a predetermined direction, means for receiving said filler block as it is sawed from the piece of Wood, means connected with the boring device for moving the filler block to a predetermined position as the boring device is moved to perform a boring operation, means for moving the carriage so that the Afiller block in the last mentioned position is automatically moved over tbe hole bored 1' n the Work succeeding the boring operation, and means for pressing the filler block into the hole bored by the boring device.

G. In a machine of the class described the combination of a supporting frame, a carriage slidable'on the frame, a rotatable and reciprocatory boring in a piece of Work, a ing a piece of Wood are to be removed, means `for moving-the carriage, sawing means for removing a liller block from the piece of Wood upon movement of the carriage infa predetermined direction, means for receiving said filler block as it is savved Jfrom the piece of Wood, means connected with the boring device for moving the filler block to a predetermined position as the boring 4device is moved to perform a boring operation, means for moving the carriage so that the liller block in the last mentioned position is automatically moved over the hole bored in the Work succeeding the boring operation, means for pressing the {iller block into the hole bored by the boring device, and means for gluing the illerblock as it is moved during the boring operation.

7. In a repairing machine of the class de scribed the combination of Aa frame, a carriage reciprocable upon the frame, a motor carried by the frame, centrics upon the shafts, means Jor driving the shafts by means of said motor, a boreV spindle carried by the carriage, operating the bore spindle from an eccentric, and means operated by another eccentrii: for inserting a iller block into abored ho e.

8. In a machine for removing knots from boards and for repairing the latter the combinatio-n of a supporting frame, a rotary boring device mounted on the frame, means for moving said rotaryboring device into operative or inoperative positions with respect to a board mounted upon the supporting frame, a filler block magazine having a plurality of iller blocks therein, and means operatively connected With the rotary boring device Jfor plac'ng a filler block from the maga-zine in the opening left in the board incidental to an operation of the rotary boring device. i

magazine for support- GOTTFRIED MAURER.

device for boring holes Y from which filler blocks horizontal shafts, .eci means for f 

